Northern California has experienced a bit of a shock over the last few days.  The temperature yesterday 
morning was 27 degrees 
Fahrenheit!  
That's the coldest I have ever seen it get here in the Bay Area.  However, my tropical plants are failry fine; the banana plant has some shriveling leaves and so does the colocasia, but everything else is okay, including the "non-tolerant of frost" king palm.
At least the next few days are the shortest of the year: after that, the sun stays out longer and signs of spring start to emerge...